realtime-MaskMap/106213076.html at main · frozen0601/realtime-MaskMap · GitHub

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<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
  <title>Assignment 7</title>

  <style type="text/css">
    #topic {
      font-size: 48px;
      font-weight: bold;
      text-align: center;
    }

    body {
      width: 80%;
      margin: 10px auto
    }

    table {
      margin: 10px auto;
      width: 100%;
      border: 1px solid #ccc;
    }

    td {
      text-align: right;
      padding: 5px 10px
    }

    td+td {
      text-align: left
    }
  </style>
  <script type="text/javascript" src="http://ycchen.im.ncnu.edu.tw/www2011/lab/twCity.js"></script>
  <script type="text/javascript">
    window.onload = function () {
      generateDropdown();
    };


    function generateDropdown() {
      var sel = document.getElementById('dropdown');
      for (var i in cityArr) {      //automatically generate dropdown
        var opt = document.createElement('option');
        opt.innerHTML = i;
        opt.value = i;
        sel.appendChild(opt);
      }
    }

    function generateDropdown2(selTag) {
      var city = selTag.options[selTag.selectedIndex].text;
      var sel = document.getElementById('dropdown2');
      for (let i = sel.options.length - 1; i >= 0; i--) {
        sel.options[i] = null;
      }
      for (var i in cityArr) {      //automatically generate dropdown
        if (i == city) {
          for (var j in cityArr[i]) {
            var opt = document.createElement('option');
            opt.innerHTML = cityArr[i][j];
            opt.value = cityArr[i][j];
            sel.appendChild(opt);
          }
        }
      }
    }

  </script>
</head>

<body>
  <h2>Assignment 7: 口罩剩餘數量即時線上查詢</h2>
  <p id="test"></p>
  <form id="join" action="mask.php" method="post">
    <fieldset>
      <select id="dropdown" name="sdropdown" onchange="generateDropdown2(this)">
        <option selected="selected">請選擇縣市</option>;
      </select><br />
      <select id="dropdown2" name="sdropdown2" onchange="search2(this)">
        <option selected="selected">請選擇鄉鎮</option>;
      </select><br />
      <div id="dala"></div>
      <div id="buttons"><input type="submit" value="search"/></div>
    </fieldset>
  </form>


</body>

</html>